Finding the Fourth Proportional to 163.42, 225.99 and 138.81
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Solution
The fourth proportional to 163.42, 225.99 and 138.81 is: 191.97
Step by Step Solution
- Step 1: Write the proportion equation
163.42 : 225.99 = 138.81 : x - Step 2: Convert to fraction form
163.42/225.99 = 138.81/x - Step 3: Cross multiply
163.42x = 225.99 × 138.81 - Step 4: Simplify right side
163.42x = 31,370.52 - Step 5: Solve for x
x = 31,370.52/163.42 - Step 6: Final answer
x = 191.97
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Why These Related Problems?
These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.